x+3/20x=46
23x/20 = 46
x = 46 x 20 /23 = 40
,x-1/5x=40
4x/5 = 40
x = 200/4 = 50
,x-1/2x=3/4
x/2 = 3/4
x = 3/2
,x-0.2x=18
0.8x = 18
x= 180/8 = 45/2